Finding the Fourth Proportional to 81,207.20, 121,810.80 and 39,735.20
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Solution
The fourth proportional to 81,207.20, 121,810.80 and 39,735.20 is: 59,602.80
Step by Step Solution
- Step 1: Write the proportion equation
81,207.20 : 121,810.80 = 39,735.20 : x - Step 2: Convert to fraction form
81,207.20/121,810.80 = 39,735.20/x - Step 3: Cross multiply
81,207.20x = 121,810.80 × 39,735.20 - Step 4: Simplify right side
81,207.20x = 4,840,176,500.16 - Step 5: Solve for x
x = 4,840,176,500.16/81,207.20 - Step 6: Final answer
x = 59,602.80
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.